Comparison of EG-Silicone SBSE and Derivatization PDMS SBSE for the Determination of Phenolic Compounds and Off-Flavors in Water


App Note 12/2012

16 phenolic compounds along with typical drinking water off-flavor compounds like geosmin, 2-methylisoborneol(MIB), and 2,4,6-trichloroanisole (TCA) were determined using two different approaches: 1) In-situ derivatization with acetic anhydride followed by SBSE using the PDMS Twister and Thermal Desorption (TD)-GC/MS; 2) Direct SBSE without derivatization using the EG-Silicone Twister and subsequent TD-GC/MS. In the case of the EG-Silicone twister, derivatization is not required due to its higher affinity for polar compounds. Both methods were evaluated for the extraction of 0.01 to 1 μg/L of phenols from water samples.